Right now I don't have a forum either, but a social networking site that is set much alike a forum website, hence needing moderation.
As this is is a new project, I'm simply applying the same strategies used when I ran forums in the past; one admin (myself) a super-moderator with admin rights, and a moderator.
Most startup forum work fine with 2-3 staff members for as long as the forum remains under 100 members. Beyond this milestone, or when the forum is pretty busy before reaching this, then adding more moderators, perhaps one per category, is a good way to keep everything in control until the need of more staff comes up.